Engineering

Permanent URI for this community

http://localhost:4000/handle/123456789/53

Browse

Browsing Engineering by Author "Delfiya, D.S.A."

Now showing 1 - 12 of 12
  • Item
    Advanced drying techniques for fish
    (ICAR - Central Institute of Fisheries Technology, Cochin, 2019) Delfiya, D.S.A.
  • Item
    Design and working principles of CIFT solar hybrid dryers
    (ICAR - Central Institute of Fisheries Technology, Cochin, 2019) Alfiya, P.V.; Murali, S.; Delfiya, D.S.A.; Samuel, M.P.
  • Item
    Development of an energy efficient portable convective fish dryer
    (Society of Fisheries Technologists (India), 2019) Alfiya, P.V.; Murali, S.; Delfiya, D.S.A.; Samuel, M.P.
    A portable multipurpose electrical dryer of 10 kg capacity was designed and developed for drying of fishe and other agricultural products. The dryer consists of a drying chamber with total drying area of 2.8 m2, fan, heating element and exhaust vent. The dryer was fabricated using locally sourced materials. Under ‘no-load’ conditions, the drying chamber attained highest temperature of 50±5°C within 60 min of operation. Relative humidity and velocity of drying air inside the drying chamber were observed to be 65% and 0.8 m/s respectively. The study of energy consumption pattern indicated a drying efficiency of 21.42%. A performance evaluation study of the dryer was done for sardine and the maximum drying time required for complete drying was eight hours. Results showed that the entire drying processes occurred under falling rate period. A logarithmic model fitted to the drying data very well for the specified range of drying conditions.
  • Item
    Drying characteristics of nandan (Chanda nama) fish in portable house hold electrical dryer
    (Central Institute of Fisheries Technology, Cochin, 2018) Delfiya, D.S.A.; Murali, S.; Alfiya, P.V.; Samuel, M.P.
  • Item
    Drying kinetics and quality characteristics of indian mackerel (Rastrelliger kanagurta) in solar-electrical hybrid dryer
    (Taylor & Francis Group, LLC, 2019) Murali, S.; Kumar, K.S.; Alfiya, P.V.; Delfiya, D.S.A.; Samuel, M.P.
    The aim of the study was to investigate the drying kinetics and quality Solar energy; hybrid dryer; characteristics of Indian mackerel dried under solar-electrical hybrid dryer modeling; drying kinetics; (S-EHD). Fresh Indian mackerel fishes (Rastrelliger kanagurta) were cleaned, quality cut into butterfly fillets, and salted overnight using a dry salting method (saltto- fish ratio, 1:3). The salted mackerel was dried in a S-EHD at the air temperature of 45-55°C, relative humidity of 47-62%, and air velocity of 0.60-0.80 m/s. Open sun drying (05D) of salted Indian mackerel was conducted to compare with S-EHD. The moisture content of the salted mackerel (61.5% w.b.) was reduced to 31.8% (w.b.) under S-EHD and 30.25% (w.b) under OSD in 8 and 32 h, respectively. The drying rate curve showed that mackerel drying occurred under falling-rate drying period in both the drying methods. A drying efficiency of 23.81% was observed for salted Indian mackerel drying under S-EHD. Diffusion approach and two-term models were selected to accurately predict the drying behavior of mackerel under S-EHD and OSD, respectively. Total volatile base nitrogen (TVB-N), trimethylamine, and thiobarbituric acid analysis of dried samples revealed that the mackerel dried under S-EHD was better than OSD. In the sensory analysis, samples dried under S-EHD recorded highest overall acceptability score.
  • Item
    Effect of microwave blanching and brine solution pretreatment on the quality of carrots dried in solar-biomass hybrid dryer
    (2018) Delfiya, D.S.A.; Mohapatra, D.; Kotwaliwale, N.; Mishra, A.K.
    The effect of microwave blanching time (0–3 min), followed by dipping in brine solution (sample to solution ratio 0–4) prior to drying of carrot slices and shreds in solar-biomass hybrid dryer on the final moisture content of the samples, drying rate, rehydration ratio, color change, textural firmness change, and beta carotene content was studied using two-factor 3 level factorial design. Pretreatment parameters were optimized using response surface methodology. As the microwave blanching time increased, there was an increase in the drying rate, rehydration ratio, and beta carotene content, with minimum changes in textural firmness, color, and final moisture content. Increase in brine solution to sample ratio impacted the drying rate and beta-carotene content in the samples, positively. Microwave blanching time of 3 min and brine solution to sample ratio of 2 were found to be the optimum pretreatment parameters for drying of carrot slices and shreds.
  • Item
    Empirical modelling of drying characteristics of elongate glassy perchlet (Chanda nama) (Hamilton, 1822) in solar hybrid dryer
    (2018) Alfiya, P.V.; Murali, S.; Delfiya, D.S.A.; Samuel, M.P.
    This study was conducted to evaluate the performance of solar dryer with electrical back-up to produce quality dried Glassy perchlet (Chanda nama). Insolation of the experimental region varied from 25 to 1025 W m-2. Atmospheric temperature showed a variation between 29.5 to 34.5°C. Relative humidity outside the dryer ranged from 56 to 76.5% showing a direct relationship with temperature. Drying experiment was carried out for 10 h at drying air temperature of 60°C. Relative humidity and velocity of drying air inside the drying chamber was 68% and 0.8 m s-1 respectively. Drying conditions were maintained inside the dryer by electrical back-up. Weight loss of pre-processed C. nama during drying was measured at 1 h duration. Drying characteristic data were fitted into empirical drying models. Two-term model was found to be the best fit for the drying characteristic data under specified conditions (R2=0.998, RMSE=0.016 and χ 2=0.00027).
  • Item
    Engineering tools and technologies for fish processing : A profitable venture in agri-business
    (ICAR - Central Institute of Fisheries Technology, Cochin, 2018) Samuel, M.P.; Murali, S.; Delfiya, D.S.A.; Alfiya, P.V.
  • Item
    Engineering tools and technologies for fish processing: a profitable venture in agri-business
    (ICAR - Central Institute of Fisheries Technology, Cochin, 2018) Samuel, M.P.; Murali, S.; Delfiya, D.S.A.; Alfiya, P.V.
  • Item
    In vitro release kinetics of spray dried curcumin-loaded egg albumin microparticles
    (2017) Delfiya, D.S.A.; Thangavel, K.
    Curcumin-loaded egg albumin microparticles were prepared by spray drying and the in vitro release profile was analyzed for 72 h. Results showed that the curcumin release rate was controlled by egg albumin concentration. The initial fast release and further controlled release of curcumin was observed in all formulations. Release data was fitted in mathematical models and found that curcumin release from all the formulations were best explained by Hixson-Crowell model followed by first order. Best fit of Hixson-Crowell model (R2>0.99) indicated a change in surface area and diameter of the microparticles with the progressive dissolution of egg albumin as a function of time. Release exponent (n) values of less than 0.4 indicated the Fickian diffusion controlled release of curcumin from microparticles. Spray drying can be suggested as a suitable method to prepare microparticles with controlled delivery of curcumin
  • Item
    Infrared fish dryer
    (Central Institute of Fisheries Technology, Cochin, 2018) Delfiya, D.S.A.; Murali, S.; Alfiya, P.V.; Samuel, M.P.
  • Item
    Portable multi purpose electrical dryer - an aid to year round dry fish production
    (2017) Alfiya, P.V.; Murali, S.; Delfiya, D.S.A.; Samuel, M.P.